V-P-Zr catalysts and method of preparation thereof in the absenc

Details V-P-Zr catalysts and method of preparation thereof in the absenc V-P-Zr catalysts and method of preparation thereof in the absenc

1974-04-17

1976-01-06

Garvin, Patrick P.

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

252428, 252435, 252437, 2603468A, B01J 2718

Patent

active

039310469

ABSTRACT:
V-P-Zr catalysts having good activity and selectivity and high physical strength for the oxidation of alkanes, cycloalkanes and mixtures rich in them to dicarboxylic acid anhydrides (e.g. maleic anhydride) are prepared by refluxing an aqueous mixture of vanadium pentoxide and lower dialkyl phosphonate, adding a zirconium salt, and then adding phosphoric acid.

REFERENCES:
patent: 2773921 (1956-12-01), Rylander et al.
patent: 3156705 (1964-11-01), Kerr
patent: 3293268 (1966-12-01), Bergman et al.
patent: 3684741 (1972-08-01), Friedrichsen et al.
patent: 3832359 (1974-08-01), Freerks et al.

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